The so-called hexagon socket head bolt refers to the cylindrical head is in the shape of a hexagon socket, which can also be called a hexagon socket head screw, a hexagon socket head screw and a hexagon socket head screw. Advantages of using hexagon socket bolts
Screws and nuts are also common fasteners in our daily life, but rust is also a common problem of screws and nuts, and being able to easily unscrew rusted screws and nuts is the way we all want to know, here, I will share with you about the rusted screw and nut, no matter how serious the rust is, and teach you a good way to unscrew it easily.
Bolts and screws are our common connection fasteners, which mainly play the role of connection and fixation in various fields and equipment.
At present, the fasteners on the market mainly include ordinary screws, machine screws, self-tapping screws and expansion screws.
Beijing, March 9 (Reporter Wang Zheng) It was learned from the Ministry of Industry and Information Technology that in 2021, the added value of China's manufacturing industry will reach 31.4 trillion yuan, accounting for 27.4% of GDP. Since 2010, the added value of China's manufacturing industry has ranked first in the world for 12 consecutive years.
According to the data of China Customs, the import and export of machine tools in the first half of 2021 showed an overall trend of significant growth. The total import and export volume was 15.85 billion USD, up 29.2% year on year, and the growth rate was 1.3 percentage points lower than the first quarter. Compared with the first half of 2019, the growth rate was 13.3 percent, with a two-year average of 6.4 percent.
